title: Degradable behavior and bioactivity of micro-arc oxidized AZ91D Mg alloy with calcium phosphate/chitosan composite coating in m-SBF.
abstract: The degradation behavior of a MAO-AZ91D with a calcium phosphate/chitosan composite coating in the modified simulated human body fluid (m-SBF) was investigated by immersion experiments and electrochemical impedance spectroscopy. The compositions of the composite coating soaked in the m-SBF for different time intervals were studied by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, thermo-gravimetric analysis and differential thermal analysis. The microstructures of the composite coating at different soaking stages were observed by using a scanning electron microscope. Results show that the as-prepared composite coating could slow down the corrosion rate of the AZ91D alloy and it demonstrated good bioactivity in the m-SBF. The coating's morphology changed from a flake-like one into a spherical-shaped one with the increase of immersion time in the m-SBF.
authors.affiliation: School of Chemistry Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China; Pharmacy College, Jiamusi University, Jiamusi 154007, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: School of Chemistry Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China. Electronic address: changsd@hit.edu.cn.
authors.forename: Changsong
authors.initials: C
authors.lastname: Dai
authors.affiliation: School of Chemistry Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China; School of Chemistry and Bioengineering, Suzhou Science Technology University, Suzhou 215009, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Wei
authors.affiliation: Department of Neuro Intern, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China. Electronic address: wenzhaohui1968@163.com.
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Wen
authors.affiliation: Department of Neuro Intern, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
authors.forename: Shujuan
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Department of Neuro Intern, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
authors.forename: Chuang
authors.initials: C
authors.lastname: Chen
mesh_terms: D000497:Alloys / Q000737:chemistry*; D001826:Body Fluids / Q000737:chemistry*; D002130:Calcium Phosphates / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D058266:Dielectric Spectroscopy; D004055:Differential Thermal Analysis; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010084:Oxidation-Reduction; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D000497:Alloys; D002130:Calcium Phosphates; D020099:Coated Materials, Biocompatible; D048271:Chitosan; C020243:calcium phosphate
keywords: Bioactivity; Calcium phosphate coating; Chitosan; Degradable behavior; Mg alloy